This plant-based hair dye covers grays naturally while promoting growth and manageability. Our darkest henna hair color enhances black hair with ebony tones and takes lighter locks to dark new heights. If you're looking for rich, dramatic color, this is it! Jet Black Henna from The Henna Guys: 🌿 Conditions and adds shine 🌿 Means no more irritation, bruises, or burns 🌿 Covers grays and colors your hair naturally 🌿 Boosts.